feat: update readme add contributing.md

CONTRIBUTING.md

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+# Contributing to Kan
+
+Thank you for your interest in contributing to Kan! This document provides guidelines and instructions for contributing to the project.
+
+## Getting Started
+
+1. Fork the repository
+2. Clone your fork: `git clone https://github.com/YOUR-USERNAME/kan.git`
+3. Create a new branch: `git checkout -b feat/your-feature-name`
+4. Install dependencies: `pnpm install`
+5. Copy `.env.example` to `.env` and configure your environment variables
+6. Make your changes
+7. Commit your changes: `git commit -m "feat: description of changes"`
+8. Push to your fork: `git push origin feat/your-feature-name`
+9. Open a Pull Request
+
+## Development Guidelines
+
+### Code Style
+
+- Follow the existing code style
+- Use meaningful variable and function names
+- Add comments for complex logic
+- Keep functions focused and concise
+
+### Commits
+
+- Use clear and descriptive commit messages
+- Reference issue numbers when applicable
+- Keep commits focused on single changes
+
+### Pull Requests
+
+- Provide a clear description of the changes
+- Include screenshots for UI changes
+- Keep PRs focused on a single feature/fix
+
+## Need Help?
+
+- Join our [Discord server](https://discord.gg/e6ejRb6CmT) for questions
+- Check existing issues and pull requests
+- Email [henry@kan.bn](mailto:henry@kan.bn) for major concerns
+
+## Code of Conduct
+
+Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.
+
+We aim to foster an inclusive and welcoming community. Harassment and abusive behavior will not be tolerated.
+
+## License
+
+By contributing to Kan, you agree that your contributions will be licensed under the AGPLv3 License.